Vein a. Any of the fine branching of blood vessels that network between arterioles and venules b. A tube that has an internal diameter of hair-like thinness C. Any of the tubes that carry blood toward the heart d. Any of the tubes that carry blood away from the heart.
Biology · High School · Mon Jan 18 2021
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The correct definition of a vein from the options provided is c. Any of the tubes that carry blood toward the heart. Veins are a component of the circulatory system, which is responsible for returning deoxygenated blood back to the heart. Once the blood is pumped through various organs and tissues by arteries and arterioles, veins and venules collect this blood to bring it back to the heart for oxygenation.